| 摘要 |
A packet switching system comprises a first switch and a second switch. The first switch includes a first receive port, a first plurality of transmit ports, a first switch fabric, a first reference clock signal input and a first multicast control symbol input/output port coupled to the first plurality of transmit ports for inputting a multicast control signal to be transmitted. The second switch includes a second receive port, a second plurality of transmit ports a second switch fabric, a second reference clock signal input and a second multicast control symbol input/output port coupled to the second receive port for outputting a received multicast control symbol. In operation, a multicast control symbol is generated in hardware synchronized with a reference clock signal and the multicast control symbol directly to the first plurality of transmit ports.
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